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Calibration of a hand-held instrument for measuring condensed tannin concentration based on UV- and red-excited fluorescence
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Peter Scogings --- Department of Agriculture, South Africa Sithembile Siko --- Department of Agriculture, South Africa Robert Taylor --- NRF/SAEON Ndlovo Node, South AfricaCondensed tannins are ecologically important compounds in plants for several reasons, e.g. as herbivore deterrents or protecting photosynthetic tissues against ultraviolet radiation. The hand-held Dualex Series 4 instrument was originally developed for indirect determination of flavonol concentrations in crops. Flavonols... -
Genetic diversity and population connectivity of the sea urchin Tripneustes gratilla along the South African coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Brink --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa R Dale Kuys --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa C Rhode --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa BM Macey --- Branch: Fisheries Management, Department of Agriculture, South Africa KW Christison --- Branch: Fisheries Management, Department of Agriculture, South Africa R Roodt-Wilding --- Molecular Breeding and Biodiversity Group, Department of Genetics, South AfricaThe collector sea urchin Tripneustes gratilla has been identified as a species with potential for aquaculture production in South Africa. The species’ roe is considered a culinary delicacy in Asia and Europe. However, T. gratilla remains genetically uncharacterised in South... -
Application of DNA mini-barcoding reveals illegal trade in endangered shark products in southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TA Asbury --- , South Africa R Bennett --- , United States AS Price --- , South Africa C da Silva --- , South Africa M Bürgener --- , South Africa JD Klein --- , South Africa SN Maduna --- , South Africa N Sidat --- , Mozambique S Fernando --- , Mozambique AE Bester-van der Merwe --- , South AfricaIn recent decades, a combination of increasing demand and economic globalisation has created a global market for elasmobranch products, especially the highly prized shark fins for Asian markets. Morphological species identification, as well as traditional cytochrome c oxidase subunit I...